I work with the biogeochemistry of dissolved organic matter (DOM) in the land ocean interface (LOI). Focus in the surface estuaries and submarine groundwater discharge. With my research I aim to quantitatively and qualitatively characterize DOM from different environments in the LOI from local to regional scales, and to find indications for possible sources and transformations. My main tools are two state-of the art methods for DOM analysis, Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) and optical spectroscopy of fluorescent DOM (FDOM) combined with parallel factor analysis (PARAFAC).